package com.dews.framework.config.properties;

import java.util.*;
import java.util.regex.Pattern;

import org.apache.commons.lang3.RegExUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.mvc.method.RequestMappingInfo;
import com.dews.common.annotation.Anonymous;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping;

/**
 * 设置Anonymous注解允许匿名访问的url
 *
 * @author qingfeng
 */
@Primary
@Configuration
public class PermitAllUrlProperties implements InitializingBean, ApplicationContextAware {
    private static final Pattern PATTERN = Pattern.compile("\\{(.*?)\\}");

    private ApplicationContext applicationContext;

    private List<String> urls = new ArrayList<>();

    public String ASTERISK = "*";


    //官方issue https://github.com/spring-projects/spring-boot/issues/31961
    //解决方案二: 构造函数
    private RequestMappingHandlerMapping mapping;

    public PermitAllUrlProperties(@Qualifier("requestMappingHandlerMapping") RequestMappingHandlerMapping handlerMapping) {
        this.mapping = handlerMapping;
    }

    @Override
    public void afterPropertiesSet() {

        //RequestMappingHandlerMapping mapping = applicationContext.getBean( RequestMappingHandlerMapping.class);

        //解决方案一: 指定bean获取
        //RequestMappingHandlerMapping mapping = applicationContext.getBean("requestMappingHandlerMapping",RequestMappingHandlerMapping.class);

        Map<RequestMappingInfo, HandlerMethod> map = mapping.getHandlerMethods();

        map.keySet().forEach(info -> {
            HandlerMethod handlerMethod = map.get(info);

            // 获取方法上边的注解 替代path variable 为 *
            Anonymous method = AnnotationUtils.findAnnotation(handlerMethod.getMethod(), Anonymous.class);
            Optional.ofNullable(method).ifPresent(anonymous -> Objects.requireNonNull(info.getPathPatternsCondition().getPatternValues()) //
                    .forEach(url -> urls.add(RegExUtils.replaceAll(url, PATTERN, ASTERISK))));

            // 获取类上边的注解, 替代path variable 为 *
            Anonymous controller = AnnotationUtils.findAnnotation(handlerMethod.getBeanType(), Anonymous.class);
            Optional.ofNullable(controller).ifPresent(anonymous -> Objects.requireNonNull(info.getPathPatternsCondition().getPatternValues())
                    .forEach(url -> urls.add(RegExUtils.replaceAll(url, PATTERN, ASTERISK))));
        });
    }

    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {
        this.applicationContext = context;
    }

    public List<String> getUrls() {
        return urls;
    }

    public void setUrls(List<String> urls) {
        this.urls = urls;
    }
}
